These are billable devices

• Routers
• Switches, including Layer 3, VoIP switches and switch stacks
• Firewalls
• Controllers

Note that each switch identified in a stack counts as a separate billable device, so this feature will affect your billing. Accordingly, stackable switch support is optional and can be disabled if you prefer to treat the stack as a single switch.

These are free devices

• Servers
• Workstations
• Wi-Fi access points
• Phones
• Tablets
• Hubs
• Network storage
• Printers
• Copiers
• Hypervisors
• Collectors
• Unmanaged switches
• Bridges
• Uninterrupted power supplies
• Telecommunications
• Chassis
• Load balancers
• Packet processors